Prime rib is famous for next-day sandwiches. If you want guaranteed leftovers, add an extra ¼ to ½ pound per person to your total.
If you are serving a multi-course meal with heavy sides (like mashed potatoes and creamed spinach) or as part of a buffet with other proteins, you can drop your estimate to ½ pound per person for boneless or ¾ pound for bone-in. how much prime rib roast to buy
For bone-in (standing) rib roasts, most butchers recommend one rib for every two people . A full prime rib has seven bones and can weigh 15–20 lbs, serving 12–14 people. Prime rib is famous for next-day sandwiches